|
Search: id:A140230
|
|
|
| A140230 |
|
Binomial transform of [1, 2, -3, -4, 5, 6, -7, -8, 9, 10,...]. |
|
+0
1
|
|
| 1, 3, 2, -6, -20, -28, -8, 56, 144, 176, 32, -352, -832, -960
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
FORMULA
|
A007318 * [1, 2, -3, -4, 5, 6, -7, -8, 9, 10,...]; i.e. (+) signs when n == 1 or 2 MOD 4; (-) otherwise.
|
|
EXAMPLE
|
a(4) = -6 = (1, 3, 3, 1) dot (1, 2, -3, -4) = (1 + 6 - 9 - 4).
|
|
CROSSREFS
|
Sequence in context: A007812 A082561 A110768 this_sequence A025240 A137602 A018864
Adjacent sequences: A140227 A140228 A140229 this_sequence A140231 A140232 A140233
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
Gary W. Adamson (qntmpkt(AT)yahoo.com), May 13 2008
|
|
|
Search completed in 0.002 seconds
|
